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Biology 2 > Chapter 26 > Flashcards

Chapter 26 Flashcards

1
Q

What is the function of the polar bodies that are produced during oogenesis? They are a mechanism that allows for

A

The shedding of the excess GENETIC material during the production of a haploid ovum

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2
Q

In a human male reproductive system,

A

The sperm travels through the sperm duct before reaching the urethra during ejaculation

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3
Q

Sperm from the testes can no longer reach the urethra

A

Vasectomy

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4
Q

Asexual reproduction disadvantage?

A

It produces genetically uniform populations

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5
Q

An effective way for animals to expand their population quickly and exploit an available environment

A

Asexual reproduction

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6
Q

Possess both male and female reproductive systems

A

Hermaphrodites

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7
Q

Reproductive systems with external fertilization are most common in

A

Aquatic animals

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8
Q

Involves the breakdown of the endometrium

A

Menstruation

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9
Q

In human females, the ovarian cycle begins when the

A

Hypothalamus stimulates the anterior pituitary to increase its output of FSH and LH

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10
Q

What would happen if an embryo failed to secrete HGC

A

The embryo would be aborted

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11
Q

Oxytocin controls the contractions of the uterus. Of which type of tissue is the uterus composed of?

A

Smooth muscle

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12
Q

What advantage is associated with human testes located in an external sac rather than in a abdominal cavity

A

The testes can be kept cooler than body’s interior

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13
Q

Where in a women’s reproductive tract does fertilization most often take place?

A

Oviduct

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14
Q

Where does the embryo normally implant

A

In the endometrium of the uterus

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15
Q

In humans this is completed after stimulation by sperm

A

Oogeneisis

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16
Q

Which one is incorrect about similarities between male and female

Both have paired gamete producing organs

Both have erectile tissue that becomes engorged with blood during sexual excitement

Both have a pair of tubes that carry gametes

Both have a urethra that carries both urine and gametes

A

Both have a urethra that carries both urine and gametes

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17
Q

What moves the human egg through the oviduct

A

The beating of cilia in the oviduct

18
Q

In a human female reproductive system the

A

Outer features are collectively called vulva

19
Q

A vasectomy involves removing a section of each

A

Vas deferens

20
Q

What STD is not caused by a virus

A

Chlamydia

21
Q

A diaphragm functions as a birth control device by

A

Preventing the movement of speak into the uterus

22
Q

Which of the following types of pathogens cause sexually transmitted diseases that are generally not curable

A

Viruses

23
Q

prevents the movement of sperm out of the testes

A

Vasectomy

24
Q

Contains enzymes that are released when the sperm encounters an egg and dissolved a hole in the jellylike matrix that surrounds the egg

A

Sperm cell’s acrosome

25
Q

Which one of the following is the earliest event in the process of fertilization

A

Sperm contact the jelly coat around the egg

26
Q

Which event occurs first in embryo development

A

Cleavage

27
Q

Result of programmed cell death?

A

Formation of fingers in humans

28
Q

What is gestation?

A

Pregnancy

29
Q

The lifeline between the embryo and the placenta

A

Is called the “umbilical cord”

30
Q

What process is needed to define each of the toes and fingers?

A

Programmed cell death

31
Q

What is a result from cleavage?

A

Formation of more cells

32
Q

The liver, pancreas, and lining of the digestive tract come from

A

Endoderm

33
Q

Changes the blastocyst into an embryo that has three tissue layers

A

Gastrulation

34
Q

Mesoderm gives rise to the

A

Heart and kidneys

35
Q

When does the human embryo implant in the wall of the uterus

A

About a week after conception

36
Q

At about what point in gestation can an ultrasound exam determine the sex of the fetus

A

At the end of the first trimester

37
Q

At about what point in gestation does the fetal heartbeat become audible by stethoscope and the fetus’s movements felt by the mother?

A

20 weeks

38
Q

Which of the following processes dominates the third trimester of human development?

A

Growth

39
Q

Which of the following substances stimulates contractions in uterine smooth muscle during labor?

A

Oxytocin

40
Q

3 stages of labor in order?

A

Dilation

Expulsion

Delivery of the placenta

41
Q

The “grandmother hypothesis” suggests that natural selection may have favored a woman __

A

Focusing her energy on caring for her grandchildren, instead of producing more children

Biology 2 (17 decks)

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